i think i can see it at the back panel then it goes behind the panel & runs down to the floor am i correct im getting a new fuel pump wiring loom made but need to know if thats the original wiring to use the positive as a signal wire.

 

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Be careful, as there is a wire the same colour on the opposite side of the car that runs front to rear!!
The fuel pump one is on the drivers side, the one on the other side the same colour/thickness is the fog light wire.
tabetha